Gilbarco Dispenser Two-Wire Protocol for Third-Party Pump Controllers: A New Guide
| Feature | Gilbarco Two-Wire (Legacy) | RS-422 / EDH (Modern) | Omnia Board / Wireless (New) | IFSF (Open Standard) | | :--- | :--- | :--- | :--- | :--- | | | Pump control, basic data | CRIND (card reader), high-speed data | EMV upgrades, forecourt retrofits | Next-gen POS & controller integration | | Physical Layer | 45mA Current Loop (2 wires) | RS-422, RS-232 (multiple pairs) | 802.11 wireless | TCP/IP over Ethernet | | Topology | Shared loop (daisy chain) | Point-to-point | Star (via wireless access point) | Switched Ethernet (star) | | Typical Baud Rate | 4800, 5787 baud | Up to 19,200 baud | Same as standard network | 100 Mbps / 1 Gbps | | Key Advantage | Simple, rugged, long distance | Faster, less noise, dedicated | No trenching, remote updates | Future-proof, multivendor | | Key Disadvantage | Shared loop = single point of failure | More wires, more complex | Requires power, potential interference | Requires modern POS | Its simplicity, flexibility, and interoperability make it an
Sent when the pump enters the "Collect" state. It pulls final transaction metrics (Total Volume, Total Cost, Grade Selected). basic data | CRIND (card reader)
To successfully integrate a third-party controller, the following physical and logical parameters are standard: high-speed data | EMV upgrades
The Gilbarco dispenser two-wire protocol is a widely used communication standard for integrating third-party pump controllers with Gilbarco dispensers. Its simplicity, flexibility, and interoperability make it an ideal solution for fueling operations. By understanding the protocol's details, developers and integrators can design and implement efficient and accurate fueling systems that meet the needs of their customers.